
/*
 * Copyright 2011 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
#include "SampleCode.h"
#include "SkView.h"
#include "SkCanvas.h"
#include "SkGraphics.h"
#include "SkRandom.h"
#include "SkDashPathEffect.h"
#include "SkShader.h"

static void setBitmapDash(SkPaint* paint, int width)
    {
    SkColor c = paint->getColor();

    SkBitmap bm;
    bm.setConfig(SkBitmap::kARGB_8888_Config, 2, 1);
    bm.allocPixels();
    bm.lockPixels();
    *bm.getAddr32(0, 0) = SkPreMultiplyARGB(0xFF, SkColorGetR(c),
                                            SkColorGetG(c), SkColorGetB(c));
    *bm.getAddr32(1, 0) = 0;
    bm.unlockPixels();

    SkMatrix matrix;
    matrix.setScale(SkIntToScalar(width), SK_Scalar1);

    SkShader* s = SkShader::CreateBitmapShader(bm, SkShader::kRepeat_TileMode,
                  SkShader::kClamp_TileMode);
    s->setLocalMatrix(matrix);

    paint->setShader(s)->unref();
    }

class DashView : public SampleView
    {
    public:
        DashView()
            {
            this->setBGColor(0xFFDDDDDD);
            }

    protected:
        // overrides from SkEventSink
        virtual bool onQuery(SkEvent* evt)
            {
            if (SampleCode::TitleQ(*evt))
                {
                SampleCode::TitleR(evt, "Dash");
                return true;
                }
            return this->INHERITED::onQuery(evt);
            }

        virtual void onDrawContent(SkCanvas* canvas)
            {
            static const char* gStr[] =
                {
                "11",
                "44",
                "112233",
                "411327463524",
                };

            SkPaint paint;
            paint.setStrokeWidth(SkIntToScalar(1));

            SkScalar x0 = SkIntToScalar(10);
            SkScalar y0 = SkIntToScalar(10);
            SkScalar x1 = x0 + SkIntToScalar(1000);
            for (size_t i = 0; i < SK_ARRAY_COUNT(gStr); i++)
                {
                SkScalar interval[12];
                size_t len = SkMin32(strlen(gStr[i]), SK_ARRAY_COUNT(interval));
                for (size_t j = 0; j < len; j++)
                    {
                    interval[j] = SkIntToScalar(gStr[i][j] - '0');
                    }

                SkDashPathEffect dash(interval, len, 0);
                paint.setPathEffect(&dash);
                canvas->drawLine(x0, y0, x1, y0, paint);
                paint.setPathEffect(NULL);

                y0 += paint.getStrokeWidth() * 3;
                }

            setBitmapDash(&paint, 3);
            canvas->drawLine(x0, y0, x1, y0, paint);
            }

    private:
        typedef SampleView INHERITED;
    };

//////////////////////////////////////////////////////////////////////////////

static SkView* MyFactory()
    {
    return new DashView;
    }
static SkViewRegister reg(MyFactory);

